Method for producing composition, magnetic material, and electronic component

Patent metadata

Field	Value
Publication number	US-2024363275-A1
Application number	US-202418767210-A
Country	US
Kind code	A1
Filing date	Jul 9, 2024
Priority date	Jan 31, 2022
Publication date	Oct 31, 2024
Grant date	—

Abstract

The present invention provides a method for producing a composition, with which a composition capable of forming a magnetic material exhibiting high magnetic permeability and low magnetic loss, and having excellent storage stability can be produced; a magnetic material; and an electronic component. The method for producing a composition of the present invention includes a step of obtaining a composition by supplying, to a mixing device, magnetic particles, an organic solvent, and a rheology control agent to be stirred and mixed, in which a content of the magnetic particles is 80% to 95% by mass with respect to a total mass of components supplied to the mixing device, a stirring circumferential speed during the stirring and mixing is 2.0 to 5.0 m/sec, a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 0.1 sec −1 , is 0.5 to 500 Pa·s, and a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 10 sec −1 , is 0.01 to 100 Pa·s.

First claim

What is claimed is:

1 . A method for producing a composition, comprising:
a step of obtaining a composition by supplying, to a mixing device, magnetic particles, an organic solvent, and a rheology control agent to be stirred and mixed, wherein a content of the magnetic particles is 80% to 95% by mass with respect to a total mass of components supplied to the mixing device, a stirring circumferential speed during the stirring and mixing is 2.0 to 5.0 m/sec, a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 0.1 sec −1 , is 0.5 to 500 Pa·s, and a viscosity of the composition, which is measured under a condition of a temperature of 25° C. and a shear rate of 10 sec −1 , is 0.01 to 100 Pa·s.

2 . The method for producing a composition according to claim 1 ,
wherein the stirring circumferential speed is 2.5 m/sec or more and less than 4.0 m/sec.

3 . The method for producing a composition according to claim 1 ,
wherein the content of the magnetic particles is 82% to 90% by mass with respect to the total mass of the components supplied to the mixing device.

4 . The method for producing a composition according to claim 1 ,
wherein the magnetic particles include alloy particles having a volume-average particle diameter of 1 to 30 μm.

5 . The method for producing a composition according to claim 1 ,
wherein the magnetic particles include ferrite particles containing Ni and having a volume-average particle diameter of 5 to 55 μm.

6 . The method for producing a composition according to claim 1 ,
wherein one or more binder components selected from the group consisting of a resin and a resin precursor are further supplied to the mixing device.

7 . The method for producing a composition according to claim 6 ,
wherein the binder component includes at least one of an epoxy compound or an oxetane compound.

8 . The method for producing a composition according to claim 1 ,
wherein the rheology control agent includes at least one selected from the group consisting of a polycarboxylic acid, a polycarboxylic acid anhydride, and an amide wax.

9 . A magnetic material formed of a composition which is produced by the method for producing a composition according to claim 1 .

10 . An electronic component comprising:
the magnetic material according to claim 9 .

11 . The electronic component according to claim 10 ,
wherein the electronic component is used as an inductor.

12 . The electronic component according to claim 10 ,
wherein the electronic component is used as an antenna.

13 . The method for producing a composition according to claim 2 ,
wherein the content of the magnetic particles is 82% to 90% by mass with respect to the total mass of the components supplied to the mixing device.

14 . The method for producing a composition according to claim 2 ,
wherein the magnetic particles include alloy particles having a volume-average particle diameter of 1 to 30 μm.

15 . The method for producing a composition according to claim 2 ,
wherein the magnetic particles include ferrite particles containing Ni and having a volume-average particle diameter of 5 to 55 μm.

16 . The method for producing a composition according to claim 2 ,
wherein one or more binder components selected from the group consisting of a resin and a resin precursor are further supplied to the mixing device.

17 . The method for producing a composition according to claim 16 ,
wherein the binder component includes at least one of an epoxy compound or an oxetane compound.

18 . The method for producing a composition according to claim 2 ,
wherein the rheology control agent includes at least one selected from the group consisting of a polycarboxylic acid, a polycarboxylic acid anhydride, and an amide wax.

19 . A magnetic material formed of a composition which is produced by the method for producing a composition according to claim 2 .

20 . An electronic component comprising:
the magnetic material according to claim 19 .

Assignees

• Fujifilm Corp

Inventors

• Ishikawa Tatsuo
• Miyata Tetsushi

Classifications

• H01F27/255

  made from particles (H01F27/26 takes precedence) · CPC title

• H01F1/37 Primary

  in a bonding agent · CPC title

• H01Q1/364

  using a particular conducting material, e.g. superconductor · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title